在含亲二氧化碳链段聚二甲基硅氧烷(PDMS)的嵌段聚合物中,用超临界二氧化碳选择溶胀的方法得到了闭合的纳米孔.采用反应离子刻蚀,可以将聚合物膜内部的多孔结构暴露出来,然后用原子力显微镜和扫描电镜表征.结果表明,纳米孔的形成不是简单的PDMS纳米微区溶胀,而是由相邻纳米微区在超临界流体处理过程中合并以后形成的.纳米孔的密度和孔径分别为7.0×1010/cm2和20 nm.
参考文献
| [1] | Cooper AI. .Recent developments in materials synthesis and processing using supercritical CO2[J].Advanced Materials,2001(14):1111-1114. |
| [2] | Lei Li;Hideaki Yokoyama;Taichi Nemoto;Kenji Sugiyama .Facile Fabrication of Nanocellular Block Copolymer Thin Films Using Supercritical Carbon Dioxide[J].Advanced Materials,2004(14):1226-1229. |
| [3] | Li L;Nemoto T;Sugiyama K;Yokoyama H .CO2 foaming in thin films of block copolymer containing fluorinated blocks[J].Macromolecules,2006(14):4746-4755. |
| [4] | Lei Li;Hideaki Yokoyama .Nanoscale Silica Capsules Ordered on a Substrate:Oxidation of Nanocellular Thin Films of Poly(styrene-b-dimethylsiloxane)**[J].Angewandte Chemie,2006(38):6338-6341. |
| [5] | Magerle R. .Nanotomography[J].Physical review letters,2000(13):2749-2752. |
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